I agree the British Premier League is more balanced (unpredictable) as the same time their level is not that great (Leicester winning lol) as it used to be or they even represent a high menace in the CL for the Spanigh teams or even a decent team like PSG, La Liga is a race between 3 teams (Barcelona, Real Madrid and Atletico de Madrid) and Sevilla/Valencia/Celta de Vigo will get there soon.
The BPL is my opinion is just disgusting at the moment, don't get me wrong I love watching their games but their teams in the last years they have decreased in their level (playing in European Tournaments), same with the Serie A (only Juventus hold their honor in the Euro games).
Hope Manchester United with their new transfers win the Europa League lol (Poor Zlatan and Pogba).
In this year, we will see again a Spanish Team conquering the CL.
La Liga, only league with 4 participants
http://www.uefa.com/uefachampionsleague/season=2017/clubs/index.html